一个关于计算那天是星期几的c程序

Question

如题所述

Answer 1

#include<stdio.h>
int second(int year, int month, int days)
{
static int mdays[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30 };
int i, y = year - 1;
for (i=0; i<month; ++i) days += mdays[i];
if (month>2)
{
if (((year%400)==0) || ((year&3)==0 && (year%100))) ++days;
}
return (y+y/4-y/100+y/400+days)%7;
}

void secondproblem()
{
int year,month,day,w;
static char* wday[]={ "日","一","二","三","四","五","六" };
printf("请输入年份：\n");
scanf("%d",&year);
printf("请输入月份：\n");
scanf("%d",&month );
printf("请输入日期：\n");
scanf("%d",&day);
w = second(year,month,day);
printf("%d年%d月%d日 是星期%s.\n\n", year, month, day, wday[w]);

}

int main()
{
secondproblem();
return 0;
}

Answer 2

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